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How do you know whether the Index is getting used or not [message #409900]

Wed, 24 June 2009 07:03

ashoka_bl
Messages: 315
Registered: November 2006
Location: Bangalore

Senior Member

Hi,

How do we know whether the created index is getting used or not ?

If I create a table with Primary key,By default a unique index will be created for the primary key column. How do I know whether it is getting used or not

Regards,
Ashoka BL

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Re: How do you know whether the Index is getting used or not [message #409901 is a reply to message #409900]

Wed, 24 June 2009 07:07

ThomasG
Messages: 1871
Registered: April 2005
Location: Heilbronn, Germany

Senior Member

Look at the execution plan or the session trace.

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Re: How do you know whether the Index is getting used or not [message #409902 is a reply to message #409900]

Wed, 24 June 2009 07:08

rleishman
Messages: 3191
Registered: October 2005
Location: Melbourne, Australia

Senior Member

You can use Explain Plan.

Ross Leishman

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Re: How do you know whether the Index is getting used or not [message #409904 is a reply to message #409900]

Wed, 24 June 2009 07:12

ashoka_bl
Messages: 315
Registered: November 2006
Location: Bangalore

Senior Member

Thanks for the fast replies,

Do we have any data dictionery which will determine the usage ?

Can we use v$object_usage ( without altering index with "Monitoring Usage")

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Re: How do you know whether the Index is getting used or not [message #409912 is a reply to message #409904]

Wed, 24 June 2009 07:23

Michel Cadot
Messages: 28994
Registered: March 2007
Location: Nanterre, France, http://...

Senior Member

Quote:

Can we use v$object_usage ( without altering index with "Monitoring Usage")

Yes.

Regards
Michel

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Re: How do you know whether the Index is getting used or not [message #409913 is a reply to message #409900]

Wed, 24 June 2009 07:28

ashoka_bl
Messages: 315
Registered: November 2006
Location: Bangalore

Senior Member

But when i checked v$object_usage It doesn't have any values. untill we specify alter <indexname> monitoring usage v$object_usage will not contain values.

I want to check whether my Primary key unique index is getting used or not with out checking in v$object_usage

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